Q. No.Abnormally high ionization enthalpy of B as depicted in the graph below can be due to :
1. Completely filled 2p subshell.
2. Completely filled 2s subshell.
3. Completely filled 3d subshell.
4. Completely filled 4f subshell.
The correct graph depicting ionization energies for 2nd period elements is:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. | None of the above |
The graph between ionization energy and atomic number for
the first group elements is shown below:
The element represented by Y in the graph above is -
1. Cs
2. Rb
3. Ca
4. K
In the following graph of variation of ionization energy with atomic number, X, Y, and Z represent elements.
The group number of X, Y, and Z elements is:
| 1. | 1st group | 2. | 15th group |
| 3. | 17th group | 4. | 18th group |
Consider the following curves:
X represents group with highest atomic radius. The element that belongs to Y group can be :
| 1. | Na | 2. | Mg |
| 3. | Br | 4. | Si |
The correct order of ionization energy of W, X, Y and Z is-
| 1. | W > X > Y > Z | 2. | W < X < Y > Z |
| 3. | W < X > Y< Z | 4. | W > X > Y< Z |
Match the following isoelectronic species in Column I and Column II:
| Column I | Column II | ||
| i. | a. | ||
| ii. | Ar | b. | |
| iii. | c. | ||
| iv. | d. |
| i | ii | iii | iv | |
| 1. | b | c | a | d |
| 2. | c | b | a | d |
| 3. | c | d | b | a |
| 4. | b | c | d | a |
The incorrect statement about ionization enthalpy is:
| 1. | Ionization enthalpy increases for each successive electron. |
| 2. | Noble gases have the highest ionization enthalpy. |
| 3. | A big jump in ionization enthalpy indicates a stable configuration. |
| 4. | Ionization enthalpy of oxygen is higher than that of nitrogen. |
The size of isoelectronic species: F–, Ne and Na+, is affected by :
| 1. | Nuclear charge (Z) |
| 2. | Valence principal quantum number (n) |
| 3. | Electron-electron interaction in the outer orbitals |
| 4. | None of the above factors because their size is the same |
The factor that does not affect the valence electron is:
| 1. | Azimuthal quantum number |
| 2. | Nuclear charge (Z) |
| 3. | Nuclear mass |
| 4. | Number of core electrons |
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